clogged up catylatic converter.
BAD INJECTORS ON NEWER MODELS ????
will the transmission causes my 1999 ford expedition to bog down & sputter when accelerating the 4.6liter engine.
Your Timing is not lined up properly and/or re-jet your carb.
mass air flow sensor
Yes
A damaged catalytic converter could cause that.
if catalictic converter or any other part of the exhaust is clogged, it will cause engine to bog and die.exhaust needs to be clear to allow exhaust gases to escape
Yes, overfilling motor oil can cause the engine to bog down. Excess oil can lead to foaming, which decreases lubrication efficiency and can create increased pressure in the crankcase. This can result in oil being pushed into areas where it shouldn't be, potentially causing poor engine performance. Additionally, the excess oil can interfere with the proper functioning of engine components, leading to further issues.
White smoke from the exhaust is a sign of coolant entering the combustion chamber. Most likely cause is a blown head gasket. Stop driving this vehicle until you have this repaired or you will destroy this engine.
What car and engine? How is valve and ignition timing?, fuel pressure, etc?
what would cause my car to run fine when it has first started up then after a while first gear will kinda bog down.
accleration is the speed. Velocity is when you know the speed of an object and its direction.